KEY TO THE FAMILIES. 53^ 



PAGE 



Leaves alternate and pinnate . . Mahojjany 293 



Leaves opposite and pinnate . Caltrop 289 



Leaves simple . White Alder and Heath 374376 



Styles four .... Orpine '211 



Styles five Geranium and Wood-sorrel 284. 285 



Stamens more numerous than the petals, but not twice as many 



Ovary i celled I,„ppy „^^ 



Ovary 2 celled . . . Milkwort and Mustard 294, 198 

 Ovary 3-4celled 



Leaves opposite St. John's-vvort and Huckeye 339, 324 

 Leaves alternate . . Buckwheat Tree in Cyrilla 312 

 Fertile stamens as many as the petals 

 Ovaries more than one 



Flowers imperfect Kue 290 



Flowers perfect . Milkweed and Crowfoot 294.171 



Ovary solitary, i-celled 



Flowers irregular . . . Pea and Violet 264. 346 



Flowers regular 



Flowers imperfect .Spurge 299 



Flowers perfect 



Stamens opposite the petals 

 Anthers opening by terminal pores Berberry 187 

 Anthers opening lengthwise Purslane and Leadwort 



157, 269 

 Stamens alternate with the petals 

 Leaves opposite ... St. John's-wort 339 



Leaves alternate Sundew and Saxifrage 208. 214 

 Ovary solitary, 2-celled 



Fruit a 2-winged samara .... ^L^pIe 320 



Fruit a single samara Rue 290 



Fruit a berry Grape 330 



Fruit dry, flowers perfect and racemed . Cyrilla 310 



Fruit a drupe, flowers imperfect and clustered Crowberry 304 



Ovary solitary, 3-celled . . . Galax in Uiapensia 402 



Ovary 5-or more celled . . Jewel Weed and Flax 326,288 



Stamens fewer than the petals 



Petals 4 Mustard iv^ 



Petals 5 Bink 158 



Petals and sepals hardly distinct, llowers very irregular 



sec Jewel Weed 



